mirror of https://gitee.com/openkylin/linux.git
75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001, 2002 Ralf Baechle
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*/
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/termios.h>
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#include <linux/sched.h>
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#include <linux/tty.h>
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#include <asm/page.h>
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#include <asm/semaphore.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/sn0/hub.h>
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#include <asm/sn/klconfig.h>
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#include <asm/sn/ioc3.h>
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#include <asm/sn/sn_private.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#define IOC3_CLK (22000000 / 3)
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#define IOC3_FLAGS (0)
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static inline struct ioc3_uartregs *console_uart(void)
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{
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struct ioc3 *ioc3;
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nasid_t nasid;
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nasid = (master_nasid == INVALID_NASID) ? get_nasid() : master_nasid;
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ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(nasid)->memory_base;
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return &ioc3->sregs.uarta;
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}
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void prom_putchar(char c)
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{
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struct ioc3_uartregs *uart = console_uart();
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while ((uart->iu_lsr & 0x20) == 0);
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uart->iu_thr = c;
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}
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static void ioc3_console_write(struct console *con, const char *s, unsigned n)
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{
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while (n-- && *s) {
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if (*s == '\n')
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prom_putchar('\r');
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prom_putchar(*s);
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s++;
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}
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}
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static struct console ioc3_console = {
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.name = "ioc3",
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.write = ioc3_console_write,
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.flags = CON_PRINTBUFFER | CON_BOOT,
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.index = -1
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};
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__init void ip27_setup_console(void)
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{
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register_console(&ioc3_console);
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}
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void __init disable_early_printk(void)
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{
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unregister_console(&ioc3_console);
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}
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